A GE Dash 8-40CW is a 6-axle diesel locomotive built by GE Transportation Systems from 1990 to 1994. It is distinguished from the Dash 8-40C by the addition of a "wide" or "safety" cab. The first Dash 8-40CW was delivered to the Union Pacific railroad in 1990, and GE would build 756 Dash 8-40CWs in total. Like most GE locomotives, the Dash 8-40CW saw continuous upgrades over the course of its production. It is powered by a 4,000-horsepower diesel engine and depending on customer options it carries approximately 5000 US gallons of diesel fuel, 410 US galons of lubricating oil, and 380 gallons of coolant.Source: http://en.wikipedia.org/wiki/GE_Dash_8-40CW